Direction: Study the following information carefully and answer the given questions.

In a certain code language,

'exams are not easy' is written as 'ems hbg lmt zeb'

'different exams present with' is written as 'byk ems jkq twr'

'all are present in' is written as 'zeb twr kil rux'

'not easy for all' is written as 'lmt rux bkt hbg'